JPH02105991A - Automatic vending machine - Google Patents

Abstract

PURPOSE:To hold the inside of a chamber where cooling operation is carried out almost at a set temperature by performing temperature control independently over remaining chambers when at least one of >=3 chambers is put in heating operation, and stopping a compressor when the internal temperatures of the remaining chambers drop below the set temperature. CONSTITUTION:Even when a right chamber 26 which does not exert any influence of hot air upon a left chamber 24 is operated in heating mode, the left chamber 24 and a center chamber 25 which are operated in cooling mode have fan devices 31 and 32 put in intermittent operation independently according to the temperature detection signals of a left-chamber cold temperature sensor 44 and a center-chamber cold temperature sensor 45. Consequently, the temperature is controlled almost to the set temperature (e.g. 3 deg.C), so the temperature in the center chamber 25 never rises extremely above the set temperature unlike before. Further, when both the temperatures in the left chamber 24 and center chamber 24 drops below the set temperature, the operation of the compressor 30 is stopped, so a refrigerating cycle is not put in unnecessary operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vending machine with a chamber switchable between a cooling mode and a heating mode.

(Prior Art) FIG. 7 shows a schematic cross-sectional structure of a conventional vending machine. That is, ] is a main body consisting of a heat insulating casing, the interior of which is partitioned into a left chamber 2 which is fixed to cooling mode, and a middle chamber 3 and right chamber 4 which can be switched to cooling mode and heating mode. In this case, the left ventricle 2 and the right ventricle 4 are each divided into, for example, eight columns, and the middle chamber 3 is divided into, for example, four columns. 5,
6 and 7 are machine chambers formed in the lower part of the main body 1, and these are the left ventricle 2. They correspond to the middle ventricle 3 and the right ventricle 4, respectively. Reference numeral 8 denotes one evaporator of the refrigeration cycle, which is disposed deep inside the machine rooms 5, 6, and 7 so as to straddle these.

9.10 and 11 are fan devices provided corresponding to the respective chambers 2, 3, and 4, and these are provided in the machine rooms 5, 6, respectively.
and 7. 12 and 13 are heaters, which are arranged in the machine rooms 6 and 7, respectively.

The fan device 9 is configured to supply cool air from the evaporator 8 into the left ventricle 2. Fan equipment &
10 supplies cold air from the evaporator 8 into the corresponding intermediate chamber 3 when the corresponding intermediate chamber 3 is switched to the cooling mode, and supplies cold air from the evaporator 8 into the corresponding intermediate chamber 3 when the corresponding intermediate chamber 3 is switched to the heating mode and the heater 12 is operated. Hot air from 12 is supplied into the middle chamber 3. Further, the fan device 11 supplies cold air from the evaporator 8 into the right ventricle 4 when the right ventricle 4 is switched to the cooling mode, and supplies cold air from the evaporator 8 into the right ventricle 4 when the right ventricle 4 is switched to the heating mode and the heater 13 is operated. Hot air from the heater 13 is supplied into the right ventricle 4. 14 is a temperature sensor located on the left chamber 2 side and attached to the evaporator 8. When the temperature of the evaporator 8 reaches the second set temperature, it turns on and operates the compressor of the refrigeration cycle. When this happens, it is turned off and the operation of the compressor is stopped. 15 and 16 are temperature sensors that detect the temperature inside the middle chamber 3 and right chamber 4, and these sensors operate the heaters 12 and 13 when the temperature inside the middle chamber 3 and right chamber 4 respectively become lower than the set temperature. When the temperature exceeds the set temperature, heaters 12 and 1
The operation of No. 3 is stopped I-. and,
Among the fan devices 9, 10 and 11, those corresponding to the rooms operated by the cooling motor are designed to operate continuously even after the compressor stops operating, so that the evaporator 8 can be defrosted. ing.

(Problems to be Solved by the Invention) According to the conventional configuration, the left ventricle 2. A state in which the middle chamber 3 and right ventricle 4 are all operating in cooling mode (this state is referred to as (C, C
, C)), the temperature of all the rooms is controlled to be substantially constant at the set temperature, as indicated by the "○" mark in FIG. However, for example, in a state where the left ventricle 2 and middle chamber 3 are operated in the cooling mode and the right ventricle 4 is operated in the heating mode (this state is expressed as (C, C, H)), the right ventricle 4 The hot air affects the middle chamber 3 but has almost no effect on the left ventricle 2, so the temperature of the middle chamber 3 is significantly higher than that of the left ventricle 2, as shown by the "X" mark in Figure 8. The problem is that it gets expensive. In addition, in such operating conditions, if the ambient temperature in which the vending machine is installed is extremely low, the temperature of the left ventricle 2, which is less susceptible to the influence of the lAN degree from the right ventricle 4 in the heating mode? When the fan device 9-10 is operated after the compressor has stopped operating (that is, when the evaporator 8 is in defrosting operation), the AA degree is 8. Properly close as shown in the figure with a ☆! Temperatures can drop too low (around -2 degrees Celsius) from 1 degree Celsius, and this point is considered an unresolved issue.

In addition, the left ventricle 2 and the right ventricle 4 are operated in the cooling mode, and the n middle chambers 3 are operated in the heating mode (C, H, C
), there is no problem because the hot air from the middle chamber 3 affects the left ventricle 2 and the right ventricle 4 in the same way, but for example, the left ventricle 2 is divided into 4 columns and the right ventricle 4 is divided into 8 columns. When the sizes of the left ventricle 2 and right ventricle 4 are different, as shown in Fig.
As indicated by the symbol △, there is a problem in which the temperature of the right ventricle 4 becomes significantly lower than the set temperature +2.

The present invention has been made in view of the above circumstances, and its principle is that when a chamber capable of switching between cooling and heating modes is operated in heating mode, the temperature of the remaining chambers operating in cooling mode is To provide a vending machine that can reliably control the temperature so that it reaches approximately the set temperature, and can stabilize the control as described in -1 even when the ambient temperature is extremely low. There is something to do.

[(1'4) of the invention (Means for solving the problem) The vending machine of the present invention has an interior partitioned into three or more chambers, at least one of which can be switched between cooling and heating modes. a main body formed into a chamber, an evaporator of a refrigeration cycle for cooling each of the above-mentioned chambers, a heater for heating the mode-switchable chamber, and a evaporator installed in a chamber corresponding to the cooling mode provided corresponding to each of the above-mentioned chambers. A fan device that supplies cold air from the heater and hot air from the heater to a chamber corresponding to the heating mode, a temperature sensor that detects the temperature of each chamber, and an auxiliary temperature sensor 1 that detects the temperature of the atmosphere outside the main body. 1. Control means for controlling the compressor, fan device, and heater of the refrigeration cycle based on the 7111 degree detection signal of the IVA degree sensor is provided.2. When a room is switched to heating mode, the heater and fan device corresponding to that room are operated, and the fan devices corresponding to the remaining rooms are independently turned on and off so that each room reaches approximately the set temperature. When the temperature of all the remaining rooms reaches approximately the set temperature, the operation of the compressor is stopped, and the fan device corresponding to the room operated in the cooling mode is switched to a continuous operation state, and further, the auxiliary temperature is When the temperature detected by the sensor is below a preset limit temperature, the fan device in a room in a cooling mode that is not adjacent to a room in a heating mode is forcibly stopped operating for a certain period of time immediately after the compressor is stopped. It is something.

(Function) According to the vending machine of the present invention, when the switching chamber is operated in the heating mode and the remaining chambers are operated in the cooling mode, the temperature of the remaining chambers becomes approximately the set temperature. The fan devices corresponding to the remaining chambers are operated intermittently independently, and the operation of the compressor is stopped when the temperature of all the remaining chambers reaches approximately the set temperature. , the temperature of the remaining chambers operating in cooling mode will not be significantly higher or lower than the set temperature.

By the way, after the compressor is stopped, the fan device corresponding to the chamber operated in the cooling mode is driven to defrost the evaporator. At this time, for example, when two adjacent chambers are operated in cooling mode and one of these chambers and the adjacent chamber is operated in heating mode, if the surrounding atmospheric temperature is extremely low,
There is a risk that the temperature in a room that is not adjacent to the room that is in heating mode may drop below the appropriate temperature, but the fan device in the room that is not adjacent to the room that is in heating mode has a temperature detected by the auxiliary temperature sensor that is within the preset limit. When the temperature is below, the operation is forced to 0 for a certain period of time, so room 7+ like J2! 4 will not occur.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 6.

First, the overall schematic configuration will be described according to FIGS. 2 to 4. Reference numeral 21 denotes a main body made of a heat-insulating casing, and the interior is divided into a left ventricle 24°, a middle ventricle 25, and a right ventricle 2 by partition walls 22 and 23.
It is divided into 6. In this case, the left ventricle 24 and the right ventricle 26
is divided into eight columns, for example, and the middle chamber 25 is divided into four columns. 27, 28 and 2 are machine chambers formed in the lower part of the main body 21, and these are the left ventricle 24.
゜They correspond to the middle ventricle 25 and the right ventricle 26, respectively. Reference numeral 30 denotes one evaporator of the refrigeration cycle, which is disposed in the machine room 27, 28 and the two inner parts so as to straddle these. Reference numerals 31, 32, and 33 are fan devices for the left ventricle, the middle ventricle, and the right ventricle, and these are arranged in the machine rooms 27, 28, and 29, respectively. 34 and 35 are heaters for the middle chamber and the right ventricle, which are arranged in the machine chambers 28 and 29, respectively. Therefore, the left chamber 24 becomes a cooling chamber exclusively for cooling mode, and the middle chamber 25 and right chamber 26 become switching chambers capable of switching modes between cooling and heating.

Here, the structure of the machine room 28 for the middle chamber 25 will be described with reference to FIGS. 3 and 4. That is, a shutter 36 is disposed in the front part of the evaporator 30 so as to be movable up and down, and a guide plate 3 is provided in the upper part of the shutter 36.
7 is pivotably installed to be rotatable left and right. Furthermore, a switching lever 38 is pivotably provided on the front side of the evaporator 30 so as to be pivotable up and down. The above-mentioned mid-chamber fan device 32 and mid-chamber heater 34 are located forward of the evaporator 30. In the state shown in FIG. 3 in which the operating portion 38a of the switching lever 38 is operated downward, the shutter 36 is moved to the upper position, and the guide plate 37 is accordingly rotated to the right. As a result, when the mid-chamber fan device 32 is operated, the air in the mid-chamber 25 is sucked into the machine room 28 from the three suction ports, and the sucked air flows as shown by arrow 40. It is supplied into the middle chamber 25 via the evaporator 30 and the middle chamber fan device 32. Therefore, when the compressor 41 (see FIG. 1) of the refrigeration cycle is in operation, cold air from the evaporator 30 is supplied into the middle chamber 25, and the refrigeration cycle is operated in the cooling mode. Further, in the state shown in FIG. 4 in which the operating portion 38a of the switching lever 38 is operated upward, the shutter 36 is moved to the lower position, and the guide plate 37 is accordingly rotated to the left. As a result, when the middle room fan device 32 is operated, the air sucked into the machine room 28 from the suction port 39 bypasses the evaporator 30 and passes through the middle room fan device 32, as shown by the arrow 42. 32 and into the middle chamber 25. Therefore, if the middle chamber heater 34 is energized and is operating to generate heat, hot air from the middle chamber heater 34 is supplied into the middle chamber 25, and operation in the heating mode is performed. The above is
Although the structure of the machine room 28 for the middle chamber 25 has been described, the structure of the two machine rooms for the right chamber 26 is exactly the same as described above, and the structure of the machine room 27 for the left chamber 24 is different from the shutter. 36. It is substantially the same as described above except for the guide slope 37 and the switching lever 38.

In addition, in FIG. 2, 43 is the left ventricle 2 of the evaporator 30.
The temperature sensor for the evaporator is attached to the fourth side, and is composed of a negative characteristic thermistor. 44, 45 and 46 are the left ventricle 24. These are cold temperature sensors for the left ventricle, middle ventricle, and right ventricle that detect the temperature of the middle chamber 25 and the right ventricle 26, and these are also composed of negative characteristic thermistors. 47 and 48 are middle chamber and right ventricular hot temperature sensors for detecting the temperatures of the middle chamber 25 and right ventricle 26, respectively, and these are also composed of negative characteristic thermistors. Further, reference numeral 8 denotes an auxiliary creep sensor attached to the back surface of the main body 21 to detect the ambient temperature outside the main body 21, and this also consists of a negative characteristic thermistor.

Now, the configuration of the electric circuit will be described according to FIG.

Reference numeral 49 denotes a temperature detection circuit for the evaporator, which is constituted by an evaporator AL temperature sensor 43 and a resistor, and its detection terminal 49a and reference terminal 49b are connected to the comparator 5.
0 non-inverting input terminal (+) and inverting input terminal (-). This comparator 50 indicates that the detected temperature of the evaporator temperature sensor 43 is the upper limit set temperature (for example, +
4° C.), the output signal becomes high level, and when the lower limit set temperature (defrosting start temperature) is reached, the output signal becomes low level. 5] is a left ventricular cold crystallinity detection circuit composed of a left ventricular cold temperature sensor 44 and a resistor;
The detection terminal 51a and the reference terminal 51b are connected to the non-inverting input terminal (+) and the inverting input terminal (-) of the comparator 52. 53 is a cold temperature sensor 45 for the middle room
This is a cold temperature detection circuit for the middle room, which is composed of a resistor and a detection terminal 53a, and a resistor. ! The gate terminal 53b is connected to the non-inverting input terminal (+) and the inverting input terminal (-) of the comparator 54. Furthermore, 55 is a right ventricular cold lH degree detection circuit configured by a right ventricular cold temperature sensor 46 and a resistor, and its detection terminal 55a and reference terminal 55b are the non-inverting input terminal (+) of the comparator 56. and the inverting input terminal (-). In this case, the converters 52, 54 and 56 are connected to the detection l, 1 .
! When the temperature exceeds the set temperature (for example, 3° C.), the output signal becomes high level, and when the temperature falls below the set temperature, the output signal 1d becomes low level. 57 is a temperature sensor 47 for the middle chamber.
The detection terminal 57a and the reference terminal 57b are connected to the inverting input terminal (-) and the non-inverting input terminal (-) of the comparator 58.
+) is connected. 5 is a stone chamber hot temperature detection circuit composed of a right ventricular hot temperature sensor 48 and a resistor, and its detection terminal 59a and reference terminal 59b are connected to the inverting input terminal (-) and non-inverting input terminal (+) of the comparator 60; )It is connected to the. In this case, comparator 5
When the detected temperatures of the hot temperature sensors 58 and 60 exceed a set temperature (for example, 55° C.), the output signals become low level, and when the temperature falls below the set temperature, the output signals become high level.

Further, 90 is connected to (1) by an auxiliary temperature sensor 89 and a resistor.
This is an outside air temperature detection circuit made up of M, and its detection terminal 90
a and the reference end Tr-90b are connected to the inverting input terminal (-) and the non-inverting input terminal (+) of the comparator 91. This comparator 91 outputs a high level signal when the temperature detected by the auxiliary temperature sensor 89 reaches the limit of 611 degrees (for example, -10 degrees Celsius), and outputs a low level signal in other states.

Reference numeral 61 denotes a changeover detection switch for the middle chamber, which is activated when the operation part 38a of the changeover lever 38 of the machine room 28 is operated in both directions (see FIG. 4), that is, the middle chamber 25 is switched to the heating mode. It is set to turn on when it is turned on. The mid-chamber changeover detection switch 61 and a resistor constitute a mid-chamber changeover detection circuit 62, and when the changeover detection switch 61 is turned on, the detection signal at the detection terminal 62a becomes high level. 63 is a right ventricular changeover detection switch;
This is turned on when the right ventricle 26 is switched to heating mode. The right ventricular changeover detection switch 63 and a resistor constitute a right ventricular changeover detection circuit 64, and when the changeover detection switch 63 is turned on, the detection signal at the detection terminal 64a becomes high level.

Therefore, the output terminal of the comparator 50 is connected to one input terminal of an AND circuit 65.
The other input terminal of 5 is connected to the output terminal of the OR circuit 66 and is also connected to the reset input terminal R of the flip-flop circuit 68 via the inverter circuit 67 . In the flip-flop circuit 68, the set input terminal S is connected to the output terminal of the AND circuit 65, and the set output terminal Q is connected to the drive circuits 69 and 70. In this case, the drive circuits 69 and 70 operate the compressor 41 and the capacitor fan device 71 when a high level signal is applied. The output terminal of the comparator 52 is connected to an OR circuit 66
is connected to the first input terminal of the OR circuit 7.
is connected to one input terminal of 2. This OR circuit 7
2, the set output terminal Q of the flip-flop circuit 68 is connected to the other input terminal via the inverter circuit 73, and the output terminal is connected to one input terminal of the AND circuit 92. The output terminal of the AND circuit 92 is connected to the drive circuit 74. In this case, the drive circuit 74 operates the left ventricular fan device 31 when a high level signal is applied. The output terminal of the comparator 54 is connected to one input terminal of an AND circuit 75 and an OR circuit 76, respectively.

Further, the detection terminal 62a of the middle chamber switching detection circuit 62 is connected to the other input terminal of the OR circuit 76 and one input terminal of the AND circuit 77, and is also connected to the inverter circuit 7.
8 to the other input terminal of the AND circuit 75, and is further connected to the AND circuit 94 via the inverter circuit 93.
is connected to the fourth input terminal of. The output terminal of the comparator 58 is connected to the input terminal of the AND circuit 77 as well. Further, the output terminal of the AND circuit 75 is connected to the second input terminal of the OR circuit 66.
The output terminal of the seven OR circuits is connected to one input terminal of the OR circuit 79, and the other input terminal of the seven OR circuits is connected to the output terminal of the inverter circuit 73. The output terminals of the OR circuit 79 and the AND circuit 77 are connected to drive circuits 8o and 81, respectively. In this case, the drive circuit 80 operates the middle room fan device 32 when a high level signal is given, and the drive circuit 81 starts the heat generating operation of the middle room heater 34 when a high level signal is given. It is designed to let you do so. The output terminal of the comparator 56 is an AND circuit 82 and an OR circuit 83.
are connected to one input terminal of each.

On the other hand, the detection terminal 64a of the right ventricular switching detection circuit 64 is connected to the other input terminal of the OR circuit 83, one input terminal of the AND circuit 84, and the third input terminal of the AND circuit 94. It is connected to the other input terminal of the AND circuit 82 via an inverter circuit 85 . The output terminal of the comparator 60 is connected to the other input terminal of an AND circuit 84. Further, the output terminal of the AND circuit 82 is connected to the third input terminal of the OR circuit 66,
The output terminal of the OR circuit 83 is connected to one input terminal of the OR circuit 86, and the other input terminal of the OR circuit 86 is connected to the output terminal of the inverter circuit 73. The output terminals of the OR circuit 86 and the AND circuit 84 are connected to drive circuits 87 and 88, respectively. In this case, the drive circuit 87 operates the stone chamber fan device 33 when a high level signal is given, and the drive circuit 88 operates the right ventricular heater 35 to generate heat when a high level signal is given. It looks like this.

Further, the output terminal of the comparator 91 is connected to the second input terminal of the AND circuit 94. This AN
The inverter circuit 7 is connected to the first input terminal of the D circuit 94.
The output terminal of the AND circuit 94 is connected to the timer circuit 95. This timer circuit 95 performs a timer operation for a certain period of time, for example, 5 minutes, when the human input signal rises, and outputs a high level signal throughout the timer operation period. The output terminal of the timer circuit 95 in -1- is connected to the other input terminal of the AND circuit 92 via an inverter circuit 96.

As described above, the electric circuit shown in FIG. 1 constitutes the control circuit 97 which is the control means.

Next, the operation of this embodiment will be explained with reference to FIGS. 5 and 6.

(I) When both the middle chamber 25 and the right ventricle 26, which are the exchange chambers II and 71, are switched to cooling mode (this state is changed to (C
, C, C)...In this case, the changeover detection switches 61 and 63 are off, and the changeover detection circuit 6
The detection signals of the detection terminals 62a and 64a of Nos. 2 and 64 are both at low level. Also, the temperature of the evaporator 30 detected by the evaporator temperature sensor 43? When the FjL degree has not reached the lower limit set temperature, the output signal of the comparator 50 is at a high level. The left ventricle 24. which is detected by the cold temperature sensors 44, 45 and 46. When the temperature of the middle chamber 25 and right chamber 26 is not below the set temperature (3° C.), the outputs of the comparators 52, 54 and 56 are all at the noise level. Therefore, the output signals of the inverter circuits 78 and 85 are both high level, the output signals of the AND circuits 75 and 82 are both a negative level, the output signal of the OR circuit 66 is a negative level, and the AND circuit 65 is a negative level. The output signal of the set output terminal Q becomes the /1 high level, the flip-flop circuit 68 is set, and the output signal of the set output terminal Q becomes the /1 high level. As a result, the six drive circuits and 70 are given signals from level 7 to level 70 to operate the compressor 41 and the capacitor fan unit 7571. In addition, the comparator 52
The high level output signal λ is applied to one input terminal of an AND circuit 92 via an OR circuit 72.

At this time, in a normal state where the ambient temperature outside the main body 21 is higher than 110° C., a high level signal is applied to the other input terminal of the AND circuit 92, as will be clear from the description below. A high level signal is output from the circuit 92 and applied to the drive circuit 74. Further, the high level output signal from the comparator 54 is given to the drive circuit 80 via the OR circuits 76 and 77, and the high level output signal 9 from the comparator 56 is given to the drive circuit 87 via the OR circuits 83 and 86. Given. The drive circuits 74, 80 and 87 therefore operate the left ventricle, middle ventricle and stone chamber fan devices 31, 32 and 33. This causes the cold air from the evaporator 30 to flow into the left ventricle 24. The air is supplied to the middle chamber 25 and right chamber 26, and cooling operation of each chamber 24, 25 and 26 is performed. Then left ventricle 24. When the temperature of the middle chamber 25 or the right chamber 26 falls below the set temperature, the output signal of the comparator 52, 54 or 56 becomes low level, so the input signal of the drive circuit 74, 80 or 87 becomes low level, and the fan device 31, 32 Otherwise, the operation of 33 is stopped. Thereafter, by repeating the same operation, the left ventricle 24. The temperatures of the right ventricle 25 and the right ventricle 26 are controlled to approximately the set temperature (for example, 3° C.), as indicated by rOJ in FIG. After that, for example, even if the evaporator temperature sensor 43 reaches the lower limit set temperature and the output signal of the comparator 50 becomes low level, at this time, the cold temperature sensors 44, 45 and 46
The left ventricle detected by 24. If the temperature of any one of the middle chamber 25 and the right ventricle 26 does not drop below the set temperature by even one degree, the output signal of one of the comparators 52, 54 and 56 is at a high level. Therefore, OR circuit 66
The output signal of the inverter circuit 67 is at a high level, and accordingly, the output signal of the inverter circuit 67 is at a low level, the flip-flop circuit 68 is set to IIU L'j, and the compressor 41 continues to operate.

Then, left ventricle 24. When the temperatures in the middle chamber 25 and right chamber 26 are all below the set temperature, the output signals of the AND circuits 75 and 82 both become low level, and the output signal of the OR circuit 66 becomes low level, and the output of the inverter circuit 67 becomes low level. The signal becomes high level, and the flip-flop circuit 68 is inverted to the recent state. As a result, the set output signal of the flip-flop circuit 68 becomes low level, and the drive circuits 6 and 70 stop the operation of the compressor 41 and the capacitor fan device 71. Further, when the set output signal of the flip-flop circuit 68 becomes low level, the output signal of the inverter circuit 73 becomes high level, and therefore, this high level signal is applied to the drive circuit 74. 80 and 87 are fan devices 31.32
and 33 are operated, thereby defrosting the evaporator 3o.

After that, when the temperature of the evaporator 30 detected by the evaporator temperature sensor 43 reaches the upper limit setting 1A4 degrees (for example, +4 degrees Celsius), the output signal of the comparator 50 becomes high level. Therefore, before or after that, the left ventricle 24. When the temperature of the middle chamber 25 and the right chamber 26 exceeds the set temperature by at least 15 degrees, the output signal of the corresponding comparator 52, 54 or 56 becomes high level, so the output signal of the OR circuit 66 has reached a high level,
The output signal of the AND circuit 65 becomes high level, the flip-flop circuit 68 is inverted again to the set state, and the operation of the compressor 41 and fan device 71 is started.

(II) The middle chamber 25 serving as the switching chamber performs cooling operation and (1 chamber 26
is switched to heating mode (C, C.

H)... In this case, the changeover detection switch 63 is on, and the detection signal at the detection terminal 64a of the changeover detection circuit 64 becomes high level. Therefore, the compressor 41 in this case.
The operations of the fan devices 31 and 32 are substantially the same as described above,
The different parts will be explained below. That is, the switching detection circuit 6
When the detection signal of 4 becomes high level, this is the OR circuit 8.
3 and 86 to the drive circuit 87, so that the stone room fan device '33 is operated. Further, since the high level detection signal of the switching detection circuit 64 is given to the AND circuit 84, when the temperature inside the stone chamber 26 detected by the right ventricular hot temperature sensor 48 is below the set temperature (for example, 55° C.), the comparator 60 output signal becomes high level. As a result, the output signal of the AND circuit 84 is inverted to a high level, and the drive circuit 88 energizes the right ventricular heater 35 to start a heat generating operation. At this point, hot air from the right ventricular heater 35 is supplied into the right ventricle 26, and the right ventricle 26 is heated. Thereafter, when the temperature in the right ventricle 26 exceeds the set temperature, the output signal of the comparator 60 becomes low level, and the heating operation of the right ventricular heater 35 is stopped. below,
Similarly, the right ventricular heater 35 is intermittently operated to generate heat.
The right ventricle 26 is controlled to approximately a set temperature (for example, 55° C.), as indicated by the “X” mark in FIG. In this case, the left ventricular fan device 31 and the middle ventricle fan device 32 are also operated intermittently based on the detection operations of the left ventricular cold temperature sensor 44 and the middle ventricle cold temperature sensor 45. 25 is also controlled to approximately the set temperature (for example, 3°C). Then, when the temperature inside the left chamber 24 and the middle chamber 25 becomes lower than the set temperature, the comparators 52 and 5
4 becomes low level, and at this time, since the detection signal of switching detection circuit 64 is high level and the output signal of inverter circuit 85 is low level, the output signal of OR circuit 66 becomes low level.

Therefore, the output signal of the inverter circuit 67 becomes high level, the flip-flop circuit 68 becomes a reset state, and the operation of the compressor 41 and the fan device 71 is stopped.

(III) When the middle chamber 25 and right chamber 26, which are switching chambers, are switched to heating mode and cooling mode, respectively (C, H, C
)... In this case, the changeover detection switch 61 is on, and the detection signal at the detection terminal 62a of the changeover detection circuit 62 becomes high level. Therefore, in the same manner as in the case of item (II) above, the fan device 32 is operated continuously, and the middle chamber heater 34 is intermittently operated for heating, as indicated by the "△" mark in FIG. The heating operation is controlled so that the middle chamber 25 reaches approximately the set temperature (for example, 55° C.),
is operated intermittently to cool the left ventricle 24 and right ventricle 26 to approximately the set temperature (for example, 3° C.).

As shown in (1), (II), and (m) above, the middle chamber 25 and the right ventricle 26 can be selectively operated in either the cooling mode or the heating mode, but in particular, in the case of (II) In a state where the ambient temperature outside the main body 21 is 110° C. or lower, the timer circuit 95 comes to function. That is, the state of (It), that is, the state in which the left ventricle 24 and the middle chamber 25 are in the cooling mode and the right ventricle 26 is in the heating mode (C, C,
In H), the low level detection signal output from the detection terminal 62 a of the switching detection circuit 62 is inverted to high level by the inverter circuit 93 and then applied to the fourth input terminal of the AND circuit 94 . A high level detection signal output from the detection terminal 64a of the AND circuit 94 is applied to the third input terminal of the AND circuit 94. At this time, when the ambient temperature outside the main body 21 is below 110°C, the comparator 9 in the outside temperature detection circuit 90
Since the output signal of 1 becomes high level, the AND circuit 94
A high level signal is also applied to the second input terminal of the .

Therefore, when the compressor 41 is stopped in such a state, that is, the left ventricle 24. When the temperatures in the middle chamber 25 and the right chamber 26 are all below the set temperature and the flip-flop circuit 68 enters the reset state as described above,
The low level set output signal from the flip-flop circuit 68 is inverted to /% high level by the inverter circuit 73 and applied to the first input terminal of the AND circuit 94. As a result, a high level signal can be received at the first to fourth input terminals of the AND circuit 94.
The output of the AND circuit 94 is inverted to the /X level.

Then, the timer circuit 95 starts a 5-minute timer operation and outputs a high level signal, and after the high level signal is inverted to a low level signal by the inverter circuit 96, it is sent to the input terminal of the AND circuit 92. I can get it.

Therefore, passage of the high level signal applied from the AND circuit 92 or the inverter circuit 73 via the OR circuit 72 is blocked, and as a result, the left ventricularis is blocked for 5 minutes during the timer operation period of the timer circuit 95. The operation of the fan device 31 is forcibly stopped! You will receive 1 yu.

If the ambient temperature of the main body 21 is extremely low, below -10°C when the operating state (C, C, H) is selected, the timer circuit 95 is activated and the left The indoor fan device 31 is forcibly stopped for 5 minutes, so that the residual cool air from the evaporator 3o is no longer circulated within the left chamber 24. Therefore, the temperature in the left ventricle 24, which is not easily affected by the temperature from the right ventricle 26 which is operated in the heating mode, does not drop abnormally as in the conventional case. By the way,
FIG. 6 shows the temperature Ta of the evaporator 30 and the temperature Tb of, for example, a beverage can stored in the left ventricle 24 when the forced operation stop + L control of the left ventricular fan device 31 as described above is performed. If each change state of is shown by a solid line, ``1'' is obtained.
The broken line shows the state of change in the temperature Tc of the beverage 11't when the control as described in 1- is not performed (conventional case).

Furthermore, when the state (C, C, H) as shown in ■- is not selected, or when the ambient temperature outside the main body 21 is higher than 110°C, a high level signal is output from the AND circuit 94. Therefore, the timer circuit 95 does not start timer operation and output a high level signal, and the other input terminal of the AND circuit 92 is connected to the timer circuit 95.
The low level signal from 5 is inverted to high level by an inverter circuit 96 and is then applied.

According to this embodiment, the following effects can be obtained. That is, the influence of hot air on the left ventricle 24 is
Even if the right ventricle 26 is operated in the heating mode, the left ventricle 24 and the middle chamber 25, which are operated in the cooling mode, are operated by the cold temperature sensor 44 for the left ventricle and the cold l:4 degree sensor 4 for the middle chamber.
The fan devices 31 and 32 are independently operated intermittently based on the temperature detection signal No. 5, and the temperature is controlled to approximately the set temperature (for example, 3° C.).
temperature will not rise significantly above the set temperature.

In this case, regardless of the right ventricle 26 in the heating operation, the left ventricle 24
Since the operation of the compressor 30 is stopped when the temperature of both the inner chamber 25 and the inner chamber 25 become below the set 11 degrees Celsius, the refrigeration cycle is not operated unnecessarily. Furthermore, even when the middle chamber 25 is being heated and the right ventricle 26 is being cooled, the left ventricle 24 and the right ventricle 26 are controlled by the temperature signals detected by the left ventricular cold temperature sensor 44 and the right ventricle cold temperature sensor 46. Since the temperature is controlled, even if the sizes of the left ventricle 24 and the right ventricle 26 are different, the rain sound can be controlled to approximately the set temperature (for example, 3° C.). In addition, when only the right chamber 26 is operated in the heating mode, if the ambient temperature outside the main body 21 becomes extremely low, the defrosting operation, which causes a drop in the temperature inside the left chamber 24, is forced for 5 minutes. Since the temperature is stopped, the temperature of 611 degrees in the left 25 degrees, which is less susceptible to the influence of heat from the right ventricle 26, does not drop abnormally as in the conventional case, and stable 11:4 degree control can be performed at all times.

In addition, in the embodiment described in -1-, the left ventricle 24. Middle ventricle 25 and right ventricle 2
The middle ventricle 25 and the right ventricle 26 are two of the three chambers of 6.
However, it is possible to apply to a case where m chambers (m - o -n) of 3 or more n chambers are used as switching chambers, and even in this case. The compressor may be stopped when the temperature of all rooms other than the room being heated becomes lower than the set temperature.

[Effects of the Invention] As explained above, the vending machine of the present invention is capable of independently controlling the temperature of cooling of the remaining chambers when at least one of the three or more chambers is in heating operation. At the same time, the compressor is stopped when the temperature in all remaining rooms falls below the set temperature, making it possible to reliably control the temperature in the room being cooled to approximately the set temperature. It has excellent effects, and
If the ambient temperature outside the main unit is extremely low, the fan device in the cooling mode that is not adjacent to the room in the heating mode is configured to stop for a certain period of time, so that the temperature in the room in the cooling mode can be reduced. It is possible to prevent the temperature from decreasing abnormally, thereby realizing the stabilization of the temperature control described above.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is a configuration diagram of a control circuit, FIG. 2 is a cross-sectional view of the whole, and FIG. 3 is a vertical cross-sectional view of one machine room. FIG. 4 is a diagram corresponding to FIG. 3 showing different operating states, FIG. 5 is a temperature distribution diagram for explaining the operation, and FIG. 6 is a temperature change characteristic diagram for explaining the operation. Further, FIGS. 7 and 8 are views corresponding to FIGS. 2 and 5 showing a conventional example. In the drawing, 21 is the main body, 24 is the left ventricle, 25 is the middle chamber, 26 is the right ventricle, 27 to 29 are the machine rooms, 30 is the evaporator, 3
1 to 33 are fan devices, 34 and 35 are heaters, 4]
is a compressor, 43 to 48 are crystallinity sensors, 6] and 63 are changeover detection switches, 89 is an auxiliary temperature sensor, 9
7 indicates a control circuit (control means). Applicant: Toshiba Corporation

Claims (1)

[Claims] 1. A main body whose interior is partitioned into three or more chambers, at least one of which can be switched between cooling and heating modes, an evaporator of a refrigeration cycle for cooling each of the chambers, and a mode switchable chamber. a heater for heating a chamber, and a fan provided corresponding to each of the chambers, supplying cold air from the evaporator to a chamber corresponding to a cooling mode and supplying hot air from the heater to a chamber corresponding to a heating mode. a temperature sensor that detects the temperature of each chamber, an auxiliary temperature sensor that detects the ambient temperature outside the main body, and a compressor, fan device, and and control means for controlling a heater, and when the mode switchable chamber is switched to heating mode, the control means operates the heater and fan device corresponding to the mode, and operates the heater and fan device corresponding to the mode switchable chamber, and operates the heater and fan device corresponding to the mode switchable chamber. The fan devices corresponding to the above are operated intermittently independently so that each chamber reaches approximately the set temperature, and when the remaining chambers all reach approximately the set temperature, the operation of the compressor is stopped, and the compressor is set in cooling mode. The fan device corresponding to the room being operated is switched to a continuous operation state, and further, when the temperature detected by the auxiliary temperature sensor is below a preset limit temperature, the fan device of the room in the cooling mode that is not adjacent to the room in the heating mode is switched to a continuous operating state. A vending machine characterized in that the vending machine is configured to forcibly stop operation for a certain period of time immediately after the compressor stops.